I would turn around and practice looking forward to what was coming up rather than what has been/cannot be changed. It's like going to the beach and body surfing and spending time regretting the wave that you didn't catch instead of looking to see which one is forming and seeing if you can figure out how to catch that one. Looking at what you didn't do does not tell/teach you anything at all, there's no practice in new situations happening so you can get good at life. We all do poorly before we get any sustained practice. Look at what you did poorly at to see where you need to practice instead of using it to put yourself or others down.